Socket-shell for incandescent electric lamps



W. E. HAWKINS.

SOCKET SHELL FOR INCANDESCENT ELECTRIC LAMPS.

APPLICATION FILED SEPT. 27, 1920.

Patented July 5, 1921.

UNITED STATES,

PATENT OFFICE.

WILLIAM E. HAWKINS, OF AMI'I'YVILLE, NEW YORK.

SOCKET-SHELL FOR INGANDESCENT ELECTRIC LAMPS.

Specification of Letters Patent.

Patented July 5, 1921.

Application filed September 27, 1920. Serial Nb. 413,075.

the same, and which said drawings constitutepart of this application, and represent a view, partly in side elevation and. partly in vertical central section, of a socket-shell embodying my invention.

y invention relates to an mproved socket-shell for incandescent electrlc lamps, the object being to facilitate the application of shade-holders thereto-and to avoid the mutilation of the threads of the shells and shade-holders as well as the deformation of the latter resulting from. the strains imposed upon them in attempting to screw them upon the shells when a false start'has been made.

With these ends in view' my invention consists in a socket-shell having certain details of construction as will be hereinafter described and pointed out in the claim.

In carrying out y invention as herein shown, the socket-shell consists of a' domlcal cap 2'and a cylindrical shell-body of which the upper portion 3 is larger in diameter than its lower portion 4, thesa1d portlons 3 and 4: being separated by a shoulder 5. The lower and smaller portion 4. of the shell-body is formed with a circumferential abutmentbead 6., With the threads 7 located below the same, and with inwardly turned lead-flange 8 located directly below the-said threads and constituting the lower edge of the shell-body. When ashade-holder of any standard form is applied to a socket-shell as thus constructed, the lead flange 8 efl'ects the lining up of I the threads of the shade-holder with respect to the threads 7 of the socket-shell in such a way as to prevent the holder from being tilted and a false start made, whereby the threads of the socket-shell and of the shadeho lder are prevented from being mutilated andthe shade-holder prevented from being .bent, and whereby also time is saved. It is a common experience withdi'xtures of this classthat unless the greatest careis taken in applying a shade-holder to a socket shell it is applied thereto out of line therewith and the shade-holder then makes a false, start which precludes the correct engagement of the threads of'one part with the other. In

such a case the shade-holder must be removed and a new start made, often result, 1g in repeated trials before the shade-holder can be correctly applied to the socket-shell. These objections are overcome by my invention since thelead flange insures the correct application in the first instance'of the holder to the shell. I I claim:

A socket-shell for incandescent lamps, the I said shell having its body formed near its lower end with anlabutment-bead, with screw' threads located below the said bead andwith an inwardly turned lead-flange located below and merging directly into the said screw' threads and forming the extreme lower edge of the shell-body, whereby a shade-holder applied to the said lead-flange has its threads lined u thereby with the threads of the, body 0 the' shell.

In testimony whereof I havesigned this specification in the ing witnesses.

WILLIAM E. HAWKINS. Witnesses:

OMAR PownLn, CHAs. V. DAY.

to presence of two subscrib- 

